Fountain pen



March 14, 1950 H. c. KLAGGEs r-:TAL

FOUNTAIN PEN 2 Sl'xeets-Sheerl l Filed Oct. 20, 1944 ,l s'a'srarararsra'BON Invenms:

March 14, 195o H. C. KLAGGES ET AL.

FOUNTAIN PEN 2 Sheets-Sheet 2 Filed Oct. 20, 1944 Invenms:

HarryllKnke m E N. E Dm, H

Patented Mar. 14, 1950 UNITED STATES PATENT OFFICE FOUNTAIN PEN Henry C.Klagges, Collingswood, N. J., and Harry C. Kofke, Philadelphia, Pa.,assignors to Esterbrook Pen Company, Camden, N. J., a corporation of NewJersey Application October 20, 1944, Serial No. 559,514

(Cl. 1Z0-47) 18 Claims.'

1l Our invention relates to Writing implements of the type or characterof fountain pens, and to simple and efficient means for supplying theV Afurther object of our invention is to provide'a relatively short inksac, which may be molded into a more or less special shape from rubberor similar elastic material,y and so constructed and/or arranged that aportion of the same may be telescoped longitudinally within anotherportion thereof to displace substantially all of the air containedWithin said sac and then retracted to permit ink to enter andsubstantially ll the entire space formerly containing air.

A further object of our invention is to provide simple and efiicientmeans for operating the ink sac in both directions; preferably by asingle stroke in each direction.

A further object of our invention is to provide operating means havingor being associated with a plug element disposed internally of the inksac and designed to enter a bore portion of the pen section so as toeffect substantially complete displacement of air therefrom and insurethat the sac and the pen section-together constituting the solereservoir-shall be lled with ay A further object of our invention is toprovide means for telescoping the ink sac in ,thev form of alongitudinally reciprocable plunger so proportioned and arranged thatasingle vstroke of the same toward the nib end of the Writingl implementwill be sufficient to completely telescope or collapse the ink sac andcause the plug element disposed within the same to enter al bore portionof the pen section and effect substantially complete displacement of airwithin the same as well as that within the ink sac so that when theplunger is retracted, a supply of,

ink will substantially ll -the ink sacas welllas the bore portion of thepen section. A coiled spring may be employed to return the plunger toits initial position and the shell or casing of the Writing implementthebarrel, for instancemay be provided with a removable cap sleeve wherebyaccess to the operating stem` of theA plunger may be gained.

A further object of our invention is to provide lever-operated meansdirectly accessible eX- ternally of the shell or casing of the writingimplement for effecting reciprocative movement'of a plunger designed totelescope or collapse the ink sac.

A further object ofk our invention is to pro- 1vide operating mechanismfor the ink sac of such a character that it as Well as the ink sac may`be insertedin the shell or casing of ythefj writing implement and'removed therefrom as a complete assembly or entity.

A further object yof our invention is to provide the plug elementdisposed internally of the ink sac and designed to enter a bore portionof the pen section as an integral part of such ink' ative means inattaching the ink sack to the` plunger of the operating mechanism.

These and other features of our invention are more fully set forthhereinafter; reference being had to the accompanying drawings, more orless diagrammatic in character, in which:

Figure l is a longitudinal-sectional view of a writing implement of thefountain pen type equipped with lling means within the scope of ourinvention and showing one form of operating mechanism therefor.

Fig. 2 is a similar view, partly in section, showing portions of thestructure illustrated in Fig. 1 in another position.

Figs. 3 and 4 are fragmentary views in section and on a larger scaleillustrating details of construction Within the scope of our invention.

v Fig. 5 is a longitudinal sectional view, similar to Fig. 1,illustrating another formof fountain pen structure and another form ofloperating mechanism designed to effect the teleseop, ing of the ink sacin a filling operation.

Fig. 6 is a fragmentary sectional view illustrating a furthermodification in fountain pen construction.

Figs.v 7 and 8 are cross sectional views on the lines VII-VII andWIL-VIII, Fig.

views on a larger scale illustrating another formi:

of ink sac and its relation to the pen section within the scope of ourinvention; Fig. 13 show'- ing the ink sac in its normalpositionandgfuncg.- tioning as an ink reservoir When the ,fpen isinuse;and Fig. 14 showing the ink sac in its telescoped:

condition preliminary to a filling operation, and

Fig. l illustrates a detail of construction with-- in the scope of ourinvention.

Our improvements are preferably, but notnecjessarily, associated with afountain pen of the type in which the barrel thereofor the pensece arrenew-point insert.

The pen section-which we employ in ourimproved structure, asdistinguished fromv ordinaryy or usual pen sections common topresent-.day

fountain pens, is provided with a plurality, of.. bore portions axially.aligned; an outer bore lporl tion .receiving the sleeve of therenew-point? insertwhich is preferably in threadedengage. menttherewith, an inner bore portion which .is

considerably enlarged in cross-sectional dimension and which may becup-shaped, and a short.v intermediate borefportion Vwhich connectsl.the .ine-- nerfenlargedbore portion and 'thesleeve-receveinggfboreportion and. is .of less diameter..v

With this pen section-and itwill be underf-v stood, of course, that theouter-sleeve-receiving bore portion of the same may be fitted withanyform of pen nib and feed-bar assembly that will: extend to theintermediate bore portion-We.em.l ploy a special form of telescopic inksac-which.

maybe of two dimensions in cross-sectional area longitudinally of thesame-with the outer ande larger portion permanently attached to thatpore tion of .the pen section having the enlarged bore portion.

The outer wall surface of such inner enlarged bore portion of the pensection isspacedirom the inner wall surface of the shell or casingof`-the .pen structure-the barrel, forA instance-to...

an extent ljust suicient to receive the` wall of` the ink sac which willlie between the same ,and the inner wall surface of the shell orcasingin.

such relation that the pen section, with the ink,V

sacpermanentlyattached thereto, may be readily inserted in such shell orcasing` when the .parts of the pen structure are assembled.

Theprincipal feature of our invention Iislthe.- provision, in a Writingimplement of the fountain v pen type, of a specialform of'ink sacspecially arranged-or associated with our improvedpem section; whichinksac is intended. primarily, in connection with the space. definedbythe inner enlargedbore portion .of the vpen section,.to serve as .theentireink reservoir of 'thefountainpenL Such ink sac is highly exible orelastic sothat it may be telescoped within itself and theenf larged boreportion of the pen section to displace substantially the entire contentoffair therein4 when a portion of such sac is moved in one directionvwhereby, upon. dipping the nib ofthe fountain pen in a supply of ink,the latter. willsubvv stantially ll the space denedby the enlarged" Y 20tion .mounted in the end of such barrel. receives. aninsertible sleevecarrying a pen nib andfeedf. bar. assembly-more or less :familiarlyknown. as.

bore portion of the pen section and the interior of the ink sac afterthe latter has been retracted to its normal position.

In the drawings, and referring more particularly to Fig. 1 of the same,the shell or casing of the writing,implement-thebarrel of a fountainpen; for instance-is indicated at and the forward end of the samecarries a pen section H; which may be made of any usualmaterialtransparent or not, as may be desired. In the present instancethe pen section is shown as havinga borefportion llafreceiving arenew-point insert consistingbf a sleeve I2 which may be in threadedv.engagement with said bore portion lia, witl'ifa nibsorV pen-point I3,and a feed-bar I3a carriedby said sleeve. In the present instance, thesleeve |2is shown as engaging a seat it withirri.the:penl.section. It iswithin the scope of our invention to employ other forms of pen nib andfeed-barassemblies'which may be in frictional engagement withtheouterbore` portion lla of the :pen section with a..feedbar extendingsub--v stantially to the seat I4. Beyond the inner end` of-f therenew-point.v insert (or other form of 1 pennib and feed-bar assembly),the pen section is vprovided with ashortintermediate bore portion I5.ofless. diameter than the bore `portion I la, and

this bore portion l5 opens into an enlarged boreyportion.-liformedwithin the inner endpor-tion Il ofrthe pen section andpreferably of rounded,

cup-like form. Thepen section Il maybe tted totheshellor casing Hlin anyusual way.

Carried. by.. the innerY portion il of the pen. sectionfisan ink-'sac20; which may be oi thel shape shown, that is to say, it may be moldedwith port-ions Zta. and.. 20,? of differentV diameters so relatedto.each other tl'lattl'ie` outerwali surface. of-.thezsmaller.portion 20amay -be alignedwithv thel inner wall. surfaceof the enlarged boreportion.|6 of the pen section, for a purpose to lbe described.Theotherfend of the ink sac is permanently attached `to the pen section.

The free. end of the ink sac, in the form of fountainpen structureillustrated in Fig, 1, is operatively connected `to the end of ascrewelement' 25, in the present instance an internally threaded.sleeve, which .serves as a nutand may befreciprocatedin the shell orcasing of the fountain pen; being in operative engagement with ascrewstem Zrotatably mounted in the rear of thesame.. This screw stemmay be turned by. manipulating. an external knob 2'! but is held againstlongitudinal movement. 1t will be understood` therefore .that=turning ofthe knob 21 will effect rotation of the screw stern 2t and reciprocationof the sleeve 25 whose inner end is attached to the ink, sac 2E?.A Thisink sac, which may be of the shape shown, is arranged to telescope, asillustrated in Fig. 2, to displace air therefrom and from the pensection, and this is eiected by the screw stem 26 when the latter isturned in one direction; m0vement.of such screw stem in theoppositedirection retracting the sleeve 25 andv returning -the ink sacto its normal position with the simultaneous inflow of ink when the nibend of .the'fountain pen is immersed in a supply of the same. Asillustrated, movement of the screw stem 26 counterclock-Wise Willtelescope the ink sac, vandmover'nent ina clock-wise direction willretract the same.

The screw element 25, in the present instance the threaded sleeve, has aplug portion 252L disposed. within the inkv sac, and when the smallerportion :20a ofsuch sac is telescoped into itself andthe bore portion i6of the pen section, this plug portion enters the bore portion l5v of thepen section, substantially to the seat for the renew-poin insert;thereby effecting displacement of substantially all of the air vwithinthe ink sac and/or the pen section. Then,'upon dipping the nib end ofthe fountain pen structure into an ink supply and manipulating the knob21. in the proper direction-clock-wise in the present instancethetelescoped portion of the ink sac will be retracted and a supply of inkwill follow and substantially ll the sac in its fully extended positionas Well as the larger bore portion I6 of the pen section. Thistelescoping of the wall of the ink sac is facilitated bythe fact thatits smaller portion a may enter the enlarged bore portion I6 of the pensection without undue friction and under slight force and mayberetracted under similar conditions.

The inner end of the inksac 20 may besecured to the operativeelement--in this instance, the sleeve -in various ways. As illustratedin Figs. 1 and 2, the reduced end of the sleeve 25 may be annularlygrooved atZSb-the portion beyond the groove providing the plug element25a-and the inner end of the smaller portion 2|la of the ink sac may beapertured so that the wall of the sac surrounding such aperture may becrowded into such groove, as more clearly illustrated in Fig. 3. It'maybe desirable to bead the edge of the sac aperture, as indicated at 20;the beaded portion entering the rounded root of the groove 25h. In lieuof this, the end of the sleeve 25 may be further reduced and'threaded,as indicated at 25,.`Fig.andthe plug` element disposed within the-inkfsac may' be'of vnut-'form ()'iittlng the threaded endf259x4andcapable, with the :use 'of an interposed-washer 3|,iffof crowding thewall edgellof the 'sac aperture whether beadedgor notfagainst the end ofthe sleeve 25. f n

The threaded sleeve may be provided with a groove at its side, indicatedat 35, to'engage a rib 36 formed onthe wall of the shellv or casing I0,or on a sleeve inserted in the'barrel and properly fixed with relationto the same. This insures that the sleeve 25 will move longitudinallyonly, without rotation. It will be understood, of course, that thismechanism may be reversely arranged so that the sleeve 25 may rotatewithout longitudinal movement by. connecting the same to the knob 21,with the screw stem 26 connected to the ink sac and arranged to movelongitudinally without rotation.y Such modiiied arrangement is withinthe scope of our invention.

In lieu of the screw mechanism illustrated in Figs. 1 and 2 for eiectingthe telescoping of the ink sac, we may employ a spring-supported plungerfor such operation; a single stroke of such plunger being effective forthe purpose.

One form of plunger mechanism within the scope of our invention is'shownin Figs. 5, 6, et seq., wherein the shell or casing of the writingimplement-the fountain pen barrel-is indicated at |00, which may carrythe same form of pen section with the pen nib and feed-bar 'assembly asillustrated in Figs. l and 2. The barrel |00 is much shorter than theshell or casing |0 shown in Figs. 1 and `2, and in the present instanceit is shown in threaded engagement with a collar sleeve 40, which may bedisposed substantially midway the length of the writing implement; suchsleeve lcollar having a rearwardly or upwardly extending tubular'portion14|.

Within v'said sleeve collar a plunger 42 is arranged' for longitudinallyreciprocative-v' movement; the forward end of suchplunger being providedwith a plug element 43 adapted to' enter the smaller bore portion I5 ofthe pen section, and the ink sac being attached to such plunger in amanner substantially similarto the attachment with the longitudinallyreciprocative member 25 of the screw mechanism,`i1lustrated in Figs. 1and 2.

'The plunger 42 is provided with an annular shoulder` 42a which abutsthe inner end of the collar sleeve 40, and the portion of such plungerwithin the collar sleeve 40 and its'tubular extension 4| is surroundedby a coiledspring 44. The plunger 42 is preferably tubular, asillustrated, and may be of metal or of any suitable plastic-Celluloid,or the like. Threaded to or otherwise connected with the upper end ofthe plungerV 42 is an operating stem 45 extending beyond the tubularportion of the collarsleeve 40, indicated 'at 4|, and such stem '45 isprol vided with an annular shoulder or ange 45a against which the upperend of the coiled spring 44 abuts. This mechanism may be enclosed by acap sleeve 46, following the contour of the fountain pen barrel |00, andsuch sleeve may be in threaded or frictiorial engagement'with the collarsleeve 40 to which the fountain pen barrel |00 is attached. f

The collar sleeve may have an 'annular flange or shoulder 40alyingbetween the shell o-r casing portion |00 and the cap sleeve 4|,vandsubstantially ush with their outer surfaces. This ilange 40a .may` be ofan ornamental character, andits outer or exposedsurface imay be`'covered-witha precious or send-precious metal ktoenhance :theappearanceof the writing implement. f 1 'r The parts `fof the.vplungermechanismf illustrated in Figs. 5 and 6 are so arranged andproportioned that a single'stroke ofA the stem* will servey to telescopethe ink-sac and at'the same time compress the spring 44 to store powerfor the retraction of the' plunger 42 to the normal position,illustrated in Fig. 5. While we vhave shown in Figs. 5 and 6 a specicplungermechanism for telescoping the ink-sac, we do not wish tobelimited to the same, and other forms of plunger mechanismare within thescope of our invention. f H f In lieu of f the y vconstructionvillustrated in Fig. 5 wherein a sleeve'collar 40 is employed Vas aconnection for the shell portion |00 and a guide and support for theplunger mechanism as well as a connectiony -for the sleeve cap 46, theshell` or casingor barrel portionmay be constructed as indicated at|||l, Fig. 6.V In this arrangement, the body of the'shell or casing||0is internally thickened as indicated at 50, with a `rearwardly orupwardly extending portion 5|, tubular` in character, receiving theplunger 42, surrounded by the spring 44. The thickenedv portion 50 maybe reduced circumferentially-and threaded at 52 for engagement by thesleeve cap 46, and further vreduced to space the tubular'portion 5| fromthe-wall of the sleevecap 46 when the lat-r ter is in place. .Y

Itis also within the scope of our vinvention to employ a separatetubular section in 'lieu of the extension 5|, which tubular sectionmaybe of the same material as the shell or casing and which may be inthreaded engagement therewith to provide the guide and support theplunger mechanism. f .i

In either or bothfof themodifiedarrangements noted; a metalcollar for'ring maybe inter-- posed-:between ithe :firmer end Lofy uthe Acap fsleeve #6 'zandithe'shell l or casing-the 'pen barrelto give' thewritingimplement .anfattractive appearance.

Avfurthermodication'within the scope of our inventionis illustrated iniFig. 9, wherein we have shown levera'ctuated'mechanismfor operating aplunger.V Inlthis'arrangement we employ'lever means, that is to say, anactuating member substantially; like the well-knownv devices forcollapsing' the ink'sacs .of ordinaryfountain pens through the medium`ofa presser-bar. f

.'The`inksacfoflthe structure illustrated in Fig. 9v will be 'ofisubstantiallythe same character as those illustrated in the'otherfgures'of the drawingsandisishown eis-'connected to= a pen section having a`cup-shaped bore portion. To the'iree end of such'sac Vwe may connect vaplunger-55 arranged for longitudinal reciprocative movement withinthe/.shell or'casing of the writing implevment. This plunger maybeguided through a a'flange 55a'a't the'upper end' of the plunger 55, a.

coiled spring 51 'may berarranged, to assist in retra'cting the plungerafter it'hasbeen' actuated to? telescope the ink sac.

To impart longitudinal movement tothe plunger-forwardly totelescope' theink sac and rearwardly to retractthe samewe provide the lever 60 whichmaybe pivotally '.rnountedat Elin the wall of the shell or "casing oftheffountain'pen structure. 'Thislever'is disposed in a reverselyarranged position as 'compared withtthe usual levers' offfounta'in pensinthat' it is arranged' to be lifted or moved'toward theA rearor upperend oi the vlfountain 'pento- Voperate the Vplunger 55, instead o`fbeingmoveddownwardly or forwardly like the usual lever which servesto-compress an ink sac through'the medium of a presser-bar. The rearorupper end of this lever 60 may be pivotally connectedatli2 to a, link53, and the lower or forward end 'of this link may be connected at-64 tothe'plunger 55. By lifting the lever and giving it a Vfullmovementortothe` eX- tent yindicate-id'byfthe dotted lines, Fig. 9, the plunger551will be given a'forward or'downwar'd movement to an extent suicientto telescopethe ink sac into the enlarged bore portion ofthe pen sectionto the vposition indicated by the dotted Y lines.

`In order that the' link63 may occupy its normal position with respectto thelever connection and its connection-with the plunger55, the latterwill be slotted fora short distance at its'upper end, as indicatedat'55b, tolallow space` for the movement of said link. It vrmay beVpossible to avoid this slotting'by employinga curved link, and in thecase 'of "fountain penshavingbarrels of small diameter, a. suitabledouble-link motion may be employed to obtain'the desired stroke.

The operation of the' plunger mechanism shown in Fig.'9,A like thatillustrated in Figs. 5 and 6, is4 eiected by a single Stroke. Suchsingle stroke is ofthe same extent as the complete movement of the screwmechanism illustrated'in Figs. 1 and 2, but is much faster. As in theother -forms of structures illustrated in the drawings, the plunger 55has, at its connection'with the ink sac, aplug portion 55c to enter theintermediate smaller bore portion of .the Ipen section when the ink sacis fully 4telescoped, as indicated by the dotted lines.

Other :forms `of mechanism designed to completely 'telescopetheink `sacAwith respect to the 8 pen sectiont in; alsingle' stroke' are'- withinAthe scope of our invention.

In the'several forms 'of our improved lling mechanism; illustratedin'Figs..1, 5, 9, et seq., we have shown the plugportion disposedinternally of the inksac' and designed to enter the intermediate boreportion I5 of the pen section-such plug portion being indicated at 25e,Figi; at 43, Fig. 5,'and at 55C, Fig. 9-as a part of or'connected to thereciprocative member; the screw sleeve 25 ofthe structure illustratedAin Fig. l, or the plunger elementsillustrated in Figs. 5 and 9. Sucharrangement necessitates an aperture at the smaller or free en'dof-the'ink sac.

It is within the scope of our' invention to provide an ink sac Withoutthis aperture and to mold with the same a plug. portion designed toenter the smaller intermediate bore portion l5 of the pen section,together with an 'external knob or projection for attachment to thereciprocative member of the operating mechanism, and sacs of such typeare illustrated in Figs. 10 and 11.

The form of inksaceshown inFig. 10 is of the same general type as thoseillustrated in the other gures of the drawings with anv internal plugportionl and an external knob'portion, both integral therewith. Thesacvis indicated at 20d/having in the present instance a taperingportion Za and a portion 20!)b of larger diameterfor permanentorsubstantially permanent attachment with the portion I1 of the` pensectionv and into which and the bore portion I6 of such pen section, thesmaller tapered portion-Zmay be telescoped. The internal andJintegrahplugportion isindicated at'l vand the external: and integralknob or projection is indicated at "H. The element oftheoperativemechanismwith' which this knob isengagedmayhavea socket 'toreceive the same, as indicated by dottedllines,'withzvarlateral openingwhereby the parts may be readily assembled-in a detachable manner; suchform' ofY connection being entirely effectivein yView of the rectilinearmovement imparted by the operating mechanism.

.Another-form ofink sacfof the samegeneral type as those shown intheother gures of drawing is illustrated i'n.- Fig. 11,"which also has'v aninternal and integral plugportion "l0 and an external and integral knobor `projection 1l. In this view,` the sacis. indicatedk at 20|, having aportion 20|-a of one diameter, which may be telescoped anda portion 20Ib of larger diameter which is the partl attached to the portion l'l ofthe pen section. In all instances the plug portion, whether thatillustrated at '10, Figs. lO'vand ll, or those illustrated in the otherviews of the drawings is designed'to have a .sliding nt With'theintermediate bore portion I5'of'the pen section and its dimensionlongitudinally of-any ink sac willbe determined by the length of saidbore portion.

A further form of inksac within the'scope of our invention isillustrated in Figs. 12, 13 and 14. This form of sac which may beslightly contracted at one end or -may be ofthe -same diameterthroughoutVis indicated'at 350;1one end being expanded to t over-'theportion Il of the pen section. Instead of Aproviding this formof ink sacwith an internal plug portion to enter'the smaller intermediate boreportion I5 of the pen section when telescoped toward the same, the freeend of the ink sac is shaped ,-to provide a socket Sulla to fit over theend of aseparate member 'l5 having more or less the shapefof Vadumb-bell; including a portion 15a to function as the plug portion, areducedstem 15b, and a vprojection or head 15 at its 'opposite end whichenters the 12,5 9 socket 300a in the shaped portionof the inksac, asclearly indicated in Figs. 13 and 14. This member 15 is of relativelyhard non-compressible material and cooperates in the attachment of theing sac to the operating mechanism.

The end of the reciprocative member of th mechanism designed to effectthe telescoping'A of the ink sac, which may be the screw mechanismillustrated in Fig. l, or the plungers illustrated in Figs. and 9, isshaped to provide a socket, or may be provided with asocket member 80,such as illustrated in Fig. 15. This vsocket member receives the head orboss I5EL of the member I5 when the latter is enclosedwithin thelsocket`-3lllla of the ink sac; such portion entering the socketl membervia the lateral opening 8| Fig. 13 shows the form of thesac and itsVconnectionvvith the pen section in the normalfpositi'on, and Figflishows the sac in the telescoped condition, with the'plug portion '15e ofthe member 'l5 entering the smaller intermediate bore portion I5 of thepen section.

In our improved construction, the ink reservoir of the fountain penincludes the space within the ink sac andthe space providedby the largerbore portion Iii of the pen section. When the ink sac is properlytelescoped, substantially all of the air within these spaces isdisplaced and hence they may completely fill with ink upon theretractive movement of the telescopic portion lof the ink sac. Theamount of. ink received within this combined space is substantially thesame as or more than that received within an ordinary fountain pen inksac with the advantage that there is practically no air space in ourreservoir when the same is initially filled. This condition does notobtain with the ink sacs of ordinary fountain pens whose filling actionis effected by a laterally-engaging presser-bar.K

It will be understood that the constructional details herein describedand shown in the drawings are for illustrative purposes only and not aslimitations, since modifications may be made therein without departingfrom the spirit of our invention; all of which is deemed to be Withinthescope of the appended claims.

Weclaim: Y Y,

1. In a fountain pen and in combination with the pen section thereof, anelastic-Walled receptacle normally distended to serve as an inkreservoir having an open end receiving the pen section and a closedendgsaid closed end being capable of telescopic displacement withrespect tothe rest of the receptacle'to function as a pumping element.

2. A fountain pen having a pen section with a through bore, incombination with an ink-receiving sac attached to said section; said sacbeing of such shape that a portion thereof may be telescoped upon itselfand into the bore of the pen section.

3. In filling mechanism for writing implements of the fountain pen type,a pen section at one end of said structure having a through bore, an inksac attached to the pen section and in communication with said throughbore; a portion of said ink sac being capable of telescopio displacementupon itself toward and into said bore, and means for effectingtelescopic movement of the ink sac.

4. A structure as set forth in claim 3 wherein the means for effectingmovement of the ink sac is a plunger which serves to telescope the sameupon itself by a direct longitudinal movement in one direction, andmeans for retracting the 10 plunger and effecting movement of the inksac in the opposite direction.

5. A structure as set forth in claim 3 wherein the means for effectingmovement of the ink sac is a manually operated plunger which serves totelescope the same upon itself by a direct longitudinal movement in onedirection, and a. spring for retracting the plunger and effectingmovement of the ink sac in the opposite direction.

6. A structure as set forth in claim 3 wherein the means for effectingmovement of the ink sac in both directions is a plurality of threadedmembers in operative engagement; one of said members being connected tothe ink sac, and a rotatable knob at the end of the pen barrel foroperat- ;ing said screw mechanism.

7. In filling mechanism for writing implements o'f'th'erfountain pentype, a pen section at one 'end of said structure having a through borewith a plurality of bore portions of different diameter longitudinallythereof, an ink sac attached to the inner end of the pen section; aportion of said ink sac being capable of telescopic displacement uponitself and into the innermost bore portion of the pen section, and meansfor effecting telescopic movement of the ink sac with respect to the pensection.

' 8. A structure as set forth in claim 7 wherein the inksac isassociated with a plug portion internally thereof adapted to enter andsubstantially flll a smaller bore portion of the pen section When saidink sac is telescopically displaced upon itself and into a bore portionof said pen Section.

9. A structure as set forth in claim wherein the ink sac is providedwith an integral plug portion'internall'y thereof adapted to enter andsubstantially ll a smaller bore portion of the pen section when said inksac is telescopically displaced upon itself and into said pen section.1( }.In filling mechanism for writing implements of the fountain pentype and in combination `with the pen section of such. structure havinga through bore with a plurality of bore portions of different diameterlongitudinally thereof, an ink-receiving sac having a portion of onediameter and a portion of another diameter with itsI portion of largestldiameter attached to the pen section externally of its largest boreportion; the smaller portion of the sac being capable of telescopicdisplacement upon itself and into the innermost bore vportion ofthe pensection, and means 'for -effectingtelescopic movement of vthe 4smallerportion of the sac with respect to said pensection.

11. The combination with the barrel of a fountain pen, of a pen sectionfitting one end of the same and having a through bore with a pluralityof bore portions of different diameters longitudinally thereof; theinnermost bore portion being substantially cup-shaped, a pen nib andfeed-bar assembly carried by the pen section and in communication withthe through bore of the same, an ink-receiving sac in engagement withthe pen section and shaped to permit telescopic displacement of oneportion with respect to another portion thereof, and means for impartingmovement to a portion of the sac in both directions; one of saidmovements causing said movable portion of the sac to telescope uponitself and into the cupshaped bore portion of the pen section.

12. The combination with the barrel of a fountain pen, of a pen sectionfitting one end of the same and having a through bore with a pluralityof bore portions of different diameters; the innermost bore portionbeing substantially cup-shaped,

a, pen nib: andfeedebar assembly carried-:bysaid pen section and incommunication with its throughbore, an. ink-receiving sac in engagementlvvithgthezpen .section-and shaped toprovide por-v .tions of differentdiameters whereby the smaller 1 and inner portion may be telescopicallydisplaced Withrespect to thelargerportion enclosing the inner end of thepen section, means for imparting movement to thesmaller .portion of thesac in 'both directions; one of said movements causing .said smallerportionto telescope upon itself and into. the cup-shapedbore'portion ofthe pen section, and .a plug disposed within said sac andarrangedtoenter thesmallest bore portion of the pen.section;;suchvtelescopic displacement of the sac serving to displacexair therefrompreliminary to its receptionoi ink.

.13. The .combinationwvith the barrel of a fountainpen, .ofathreadedelement rotatably mounted inv one endofthe. pen barrel and heldagainst v.longitudinalmovement, an externally disposed knob forturningsaid element, apen sectionrdisposed atthe opposite .end of the barrel,apen nib andfeed-barassembly carried by said penseevtion, a telescopicink-receivingsac carried by the pen section and having a. portionmovable toward and from the same, a complementally threaded memberoperatively .engaging the rotatable threaded .element .and arranged forreciprocative movement upon turning saidrotatable element; saidcomplementally threaded member being `operatively connected to theinnerend of the sac, and .a yplug carried by said vcomplementally threadedmember `and disposed within the sac; said pen section having a throughbore with portions oi different diameters and said plug portion beingadapted to enter the vsmallest bore portion of the same when the sac iscollapsed to displace air therefrom.

14. In afountain pen, .the combination with the pen section thereof, apen nib and feed-bar assembly carried by said pen section, a barrel, andreciprocative .means carried by the barrel, of. an inkreceiving s'acconnected to the pen section and having .a .closed end with a socketformed therein, a headed :member disposed IWithin saidsocket and havingavplug portion disposed internally of the sac; said pen section having athrough bore with a plurality of .portions of diierent diameters intoone of Whichsaid ink sac may be telescoped and an inner bore portionreceiving the plugportion of the headed i member; one portion vof v.saidheaded member Within said socket serving as the meansfor:operlativelyconnecting the rreciprocative means to .the sac.

vl5. In ya fountain pen, a-telescopic ink sac for use therewith;5saidsacfbeing closed at one end and having a. socket at its closed end, anda. non-resilientheaded member disposed Within .the ink sac and having aportion fitting said socket; `the end .of said headed member 4enclosedby the socket Wall serving as an attachment for engagement with a memberdesigned to impart telescopic movement .to .said ink sac.

v16. -The combination of a telescopic inkreceiving sac having anexternal knob or pro `iection at its free end, reciprocating means forteles'coping the. sac having a socketed portion receiving the knob orprojectionv of the sac; said .socketed portion having a lateral openingfor the passage .of a reduced portion ofthe external knob Aorprojection.

17. A pen section for fountain pens having a through .bore with boreportions of diiferent diameters, including an outer boreportion, anintermediate bore portion less in diameter than the outer vbor-'eportion, and an inner bore portion greater in diameter than theintermediate bore portion; said inner bore portion being enclosed byanink-receivng sac.

18. A structure assetforth in claim .17, in combination with atelescopic ink-receiving sac inclosing. theinner bore portion of the pensection and `telescopically displaceable into such bore portion fordisplacement of air from the .space dened vby the. innerrborel portionand sac.

HENRY-C- KLAGGES. .HARRY C. KOFKE.

REFERENCES CITED The following-'references are of record in the iile ofthis patent:

UNITED STATES PATENTS Number 'Name Date 335,033 '-Locke Jan.'26, 1886605,259 Rich June 7, 1893 1,317,817 Ogilvy Oct. 7, l1919 1,398,779Hayden Nov. 29, .1921 1,469,921 Dutchak Oct. 9, 1923 '1,818,216Federbusch Aug. 1l, 1931 v1,902,809 Bienenstein 4 Mar. 28, 1933V1,904,358 Dahlberg Apr. 18, 1933 1,980,508 Tefft Nov. 13, 1934'1,985,643' 4lfanstiehl Dec. 25, 1934 2,093,701 Zahel f Sept. '21, 1937"2,108,552 Schoneberger 'Feb. 15, V1938 yp, ma... y., y

